package com.zuoYi;

import java.util.Scanner;

public class ATM {
    public static void main(String[] args) {
        double balance = 0;
        boolean flag = true;
        Scanner scan = new Scanner(System.in);
        do{ System.out.println("-----------ATM----------");
            System.out.println("-----------1.存款-----------");
            System.out.println("-----------2.取款-------------");
            System.out.println("-----------3.显示余额-----------");
            System.out.println("-----------4.退出-------------");
            System.out.println("-----------请选择(1-4)------------");
            int res = scan.nextInt();
            switch (res) {
              case 1:
                 System.out.println("请输入你要存款的金额：");
              double money1 = scan.nextDouble();
                    if (money1>0) {
                        balance += money1;
                    }else {
                        System.out.println("余额不足");
                    }
                    break;
            case 2:
                    System.out.println("请输入你要取款的金额：");
                    double money2 = scan.nextDouble();
                    if(money2>0||money2<=balance){
                    balance -= money2;
             }else {
                System.out.println("余额不足");
             }
            case 3:
             System.out.println("你的余额为："+balance);
            break;
            case 4:
            flag = false;
            System.out.println("感谢使用，欢迎下次再来");
            break;
            default:
             System.out.println("输入有误，请重新输入");
            break;}
           }while(flag);
            scan.close();
    }
}

